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$120+ Cheap flights from St. Louis (STL) to Mexico

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MEX
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from St. Louis to Mexico

Keep the following information in mind while searching for St. Louis to Mexico flight deals. Data was last updated July 30, 2025.

Round-trip from

$303
(FlightHub)

One-way from

$120
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$682

Good round-trip deal

$405 or less

Good one-way deal

$214 or less
From Lambert-St Louis to Mexico
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One-way flight from Lambert-St Louis to Mexico
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Highest demand for flights based on searches. 4% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Mexico.
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Price to beat on a one-way flight from Lambert-St Louis to Mexico.
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Find flight deals from St. Louis to Mexico

Cheapest flights from St. Louis to Mexico
Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1410:35 amSTL - CUN
1 stop26h 24mSpirit Airlines
Sat 9/209:40 amCUN - STL
1 stop25h 10mSpirit Airlines
Deal found 7/30$303
This Frontier deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1410:21 amSTL - CUN
Nonstop3h 13mFrontier
Sun 9/212:49 pmCUN - STL
Nonstop3h 21mFrontier
Deal found 7/29$304
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/195:15 amSTL - CUN
1 stop5h 40mAmerican Airlines
Fri 8/2210:45 amCUN - STL
1 stop13h 14mAmerican Airlines
Deal found 7/30$362
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1410:21 amSTL - CUN
Nonstop3h 13mMultiple Airlines
Wed 9/172:07 pmCUN - STL
2 stops20h 43mMultiple Airlines
Deal found 7/30$370
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/610:17 amSTL - MEX
1 stop11h 38mMultiple Airlines
Sun 11/98:10 amMEX - STL
1 stop24h 57mMultiple Airlines
Deal found 7/28$391
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:00 amSTL - SJD
1 stop7h 23mDelta
Thu 9/46:01 amSJD - STL
2 stops11h 06mDelta
Deal found 7/28$414
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:55 pmSTL - GDL
1 stop20h 10mMultiple Airlines
Tue 9/166:36 amGDL - STL
1 stop25h 30mMultiple Airlines
Deal found 7/28$416
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/273:59 pmSTL - SJD
1 stop19h 11mAmerican Airlines
Tue 9/3010:10 amSJD - STL
1 stop8h 05mAmerican Airlines
Deal found 7/28$422
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/267:01 amSTL - PVR
1 stop6h 19mAmerican Airlines
Tue 9/91:22 pmPVR - STL
1 stop8h 28mAmerican Airlines
Deal found 7/30$448
This Southwest deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/105:15 amSTL - SJD
2 stops9h 30mSouthwest
Fri 11/142:40 pmSJD - STL
2 stops8h 40mSouthwest
Deal found 7/30$452
This Trip.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:10 amSTL - PVR
1 stop6h 12mAeromexico
Thu 9/181:32 pmPVR - STL
1 stop8h 52mAeromexico
Deal found 7/28$466
This Priceline deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2010:26 amSTL - MEX
1 stop13h 54mFrontier
Tue 9/26:45 amMEX - STL
1 stop10h 24mFrontier
Deal found 7/29$478

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Mexico that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
Use the filters below to find and compare flights from St. Louis to Mexico that are best for you.

Fly from

St. Louis

Fly to

Mexico

Route

Depart

Return

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/14

10:35 am-12:59 pm

1 stop26h 24m

Cancun

Sat 9/20

9:40 am-10:50 am

1 stop25h 10m

$303

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/14

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Sun 9/21

2:49 pm-6:10 pm

Nonstop3h 21m

$304

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 8/19

5:15 am-10:55 am

1 stop5h 40m

Cancun

Fri 8/22

10:45 am-11:59 pm

1 stop13h 14m

$362

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/14

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Wed 9/17

2:07 pm-10:50 am

2 stops20h 43m

$370

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 11/6

10:17 am-9:55 pm

1 stop11h 38m

Mexico City Benito Juarez

Sun 11/9

8:10 am-9:07 am

1 stop24h 57m

$391

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Sun 8/31

6:00 am-11:23 am

1 stop7h 23m

San José del Cabo Los Cabos

Thu 9/4

6:01 am-7:07 pm

2 stops11h 06m

$414

St. LouisGuadalajara

STL - GDL

STLGDL

Lambert-St Louis

Tue 9/9

7:55 pm-3:05 pm

1 stop20h 10m

Guadalajara Miguel Hidal

Tue 9/16

6:36 am-9:06 am

1 stop25h 30m

$416

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Sat 9/27

3:59 pm-9:10 am

1 stop19h 11m

San José del Cabo Los Cabos

Tue 9/30

10:10 am-8:15 pm

1 stop8h 05m

$422

St. LouisPuerto Vallarta

STL - PVR

STLPVR

Lambert-St Louis

Tue 8/26

7:01 am-12:20 pm

1 stop6h 19m

Puerto Vallarta Ordaz

Tue 9/9

1:22 pm-10:50 pm

1 stop8h 28m

$448

St. LouisSan José del Cabo

STL - SJD

STLSJD

Lambert-St Louis

Mon 11/10

5:15 am-1:45 pm

2 stops9h 30m

San José del Cabo Los Cabos

Fri 11/14

2:40 pm-12:20 am

2 stops8h 40m

$452

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to Mexico

Have a flexible travel schedule? Discover the best time to fly to Mexico from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Mexico

What is the cheapest month to book a flight from St. Louis to Mexico?

Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $388). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MX?

Find hourly flight availability from St. Louis to Mexico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

When flying from St. Louis to Mexico, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Mexico

Get insights into the airlines that provide service to Mexico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Mexico. Reviews last updated July 30, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from St. Louis to Mexico. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Aeromexico
7.5
Good
1,721 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Mexico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Mexico?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Mexico.

  • What are the cheapest airlines to fly from St. Louis to Mexico one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $120. Users have also found prices from $129 and $183 on Frontier and United Airlines, respectively.

  • What are the most popular routes from St. Louis to Mexico?

    The most popular route from St. Louis to Mexico is Lambert-St Louis - Cancun. You may also consider Lambert-St Louis - Cozumel or Lambert-St Louis - Puerto Vallarta Ordaz.

  • Can I find deals for flights from St. Louis to Mexico that include hotel bookings?

    Yes. In addition to deals on St. Louis to Mexico flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Mexico?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico.

  • Can I find deals for business class flights from St. Louis to Mexico?

    Yes. Cheapflights offers flight deals from St. Louis to Mexico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Mexico?

    Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $388). Flying from St. Louis to Mexico in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Mexico

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from St. Louis to Mexico

Discover the top 9 airlines that operate flights from St. Louis to Mexico. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$132Average$293FlexibilityNo cancel feeOn-time65%
VolarisCheapest$174Average$367FlexibilityNo cancel feeOn-time79%
FrontierCheapest$293Average$514FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$306Average$599FlexibilityNo cancel feeOn-time71%
AeromexicoCheapest$346Average$517FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$358Average$574FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$398Average$528FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$443Average$653FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$478Average$694FlexibilityNo cancel feeOn-time63%

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